SBR treatment of high COD effluent from bottling plant

The feasibility of bench scale sequencing batch reactors (SBRs) in treating a bottling plant effluent is demonstrated at various influent chemical oxy gen demands (CODs) ranging from 300 to over 4,000 mg/L. The SBRs removed ov er 75% of the biodegradable fraction of the influent COD at a fixed react t ime of 5.5 h. An easy to use process model is presented to predict the temp oral variations of substrate, biomass, and dissolved oxygen concentrations during the fill and react periods in SBRs. The model satisfactorily predict ed effluent COD and final biomass concentrations, as well as temporal varia tions of COD, biomass, and dissolved oxygen throughout the fill and react c ycles.